WO1987002884A1 - Dispositif pour la photochirurgie et notamment pour la keratotomie de la cornee - Google Patents

Dispositif pour la photochirurgie et notamment pour la keratotomie de la cornee Download PDF

Info

Publication number
WO1987002884A1
WO1987002884A1 PCT/DE1986/000469 DE8600469W WO8702884A1 WO 1987002884 A1 WO1987002884 A1 WO 1987002884A1 DE 8600469 W DE8600469 W DE 8600469W WO 8702884 A1 WO8702884 A1 WO 8702884A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
light
raman cell
raman
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1986/000469
Other languages
German (de)
English (en)
Inventor
Hartmut Mennicke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G Rodenstock Instrumente GmbH
Original Assignee
G Rodenstock Instrumente GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by G Rodenstock Instrumente GmbH filed Critical G Rodenstock Instrumente GmbH
Publication of WO1987002884A1 publication Critical patent/WO1987002884A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804—Refractive treatments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00872—Cornea

Definitions

  • the invention relates to a device for light surgery and in particular for keratotomy of the cornea according to the preamble of claim 1.
  • UV light has hitherto been used essentially in the light keratotomy of the human eye.
  • the known excimer lasers in particular have been used, the light of which is good for making cuts or for removing material layers on the Cornea is suitable.
  • the UV radiation of the known excimer lasers has the disadvantage that the risk of mutagenicity and carcinogenicity caused by UV light cannot be neglected.
  • the article mentioned deals in a very general way with questions of laser surgery, in particular human skin, and has no connection to the keratotomy of the eye.
  • HF hydrogen fluorine
  • the HF laser is very unwieldy because of its toxic gases and the total effort required.
  • the object is to provide a device Specification for light surgery and in particular for keratotomy of the eye, which emits light in the range of 2.7 and 3.2 microns in such a way that the light beam of the device is suitable for surgical purposes.
  • an operating light source which has a pulsed laser and a Raman cell filled with a suitable Raman medium, for example a gas or a liquid, in which radiation of the wavelength between approximately 2.7 ⁇ m and approximately 3, with the aid of the stimulated Raman effect, 2 ⁇ m is generated.
  • the pulsed laser serves as a pump light source for the Raman cell. Since the conversion rate for the stimulated Raman effect is generally very high, it is possible in this way to obtain radiation in the region around 3 ⁇ m, the power of which enables light surgery and the “beam quality” of which allows excellent focusing.
  • a laser with a high repetition rate and high pulse power for example in the megawatt range
  • Such a laser is - as claimed in claim 2 - for example an iodine laser with a wavelength of 1.315 ⁇ m or a neodymium-YAG laser with a wavelength of 1.06 ⁇ m.
  • both types of laser can be operated in q-switch or mode-lock mode.
  • the Raman cell can also be filled with HCL, CO, 0 2 or NO (claim 4).
  • Advantageous combinations of these lasers with Raman media are characterized in claims 5 to 7.
  • the structure of the Raman cells can be freely designed within wide limits. When using gases as Raman media, however, high-pressure cells are particularly advantageous (claim 8). When filling with hydrogen or CH. is usually operated at a pressure of about 5 bar, typically around 25 bar. It is particularly advantageous to use a Raman cell of the wave guide type (claim 9). Such a Raman cell has the advantage that it emits a light beam that can be bundled well.
  • Fig. 1 shows a cross section through an inventive
  • Fig. 2 shows the dependence of the Stokes energy on the
  • FIG. 1 schematically shows a cross section through a device according to the invention, in which an NdYAG laser 1 is used as the pump laser, the light of which focuses a lens 2 into a high-pressure Raman cell 3.
  • the light which arises in the Raman cell in the Stokes orders is coupled in by a lens 4 into an operating beam path (not shown in more detail) as parallel light.
  • an NdYAG laser which operates in multimode mode and which delivers an energy of up to 1.5 joules per pulse at a pulse repetition rate of at most 10 Hz and a pulse duration of 15 ns.
  • Raman cell 3 has an inner diameter of approx. 10 mm and a length of approx. Im and is closed off by flat windows 3 'or 3 ".
  • the gas pressure in the Raman cell can be up to 35 bar.
  • the Raman cell is CH. filled.
  • the pressure was varied between about 1 bar and about 35 bar.
  • lenses 2 of different focal lengths have been used to focus the light of the NdYAG laser 1 into the Raman cell.
  • the focal lengths of the lens * 2 are 500 mm, 750 mm and 1000 mm.
  • the best results are obtained when the gas pressure is approximately 27.5 bar and the focal length of the focusing lens 2 is 1000 mm, i.e. roughly equal to the length of the Raman cell.
  • the reason for this is likely to be gas breakthroughs at smaller focal lengths, which lead to a breakdown of the Raman conversion into the 2nd order of stokes and, moreover, to considerable impurities in the Raman cell (splitting into carbon and hydrogen).
  • FIG. 3 shows the dependence of the Stoke energy on the energy of the pump laser radiation with optimal focusing and optimal pressure.
  • pump energies of approximately 500 mJ give energy per shot of approximately 10 mJ, which are sufficient, for example, for radial keratotomy.
  • the invention has been described above on the basis of an exemplary embodiment without restricting the general inventive concept - to use an operating light source which has a Raman cell pumped with a pulsed laser to generate light in the wavelength range between 2.7 ⁇ m and 3.3 ⁇ m .
  • the arrangement proposed according to the invention has the advantage that, with comparatively little effort, a light source can be obtained which emits light of good beam quality in the wave range from 2.7 ⁇ m to 3.2 ⁇ m, which according to the invention is particularly suitable for the keratotomy of the eye and the extensive ablation of layers of the cornea has been appropriately recognized.
  • the device for light surgery can have a known structure;
  • a laser device with slit lamp known per se can be used, in which the laser beam covers the area in which an incision is made. should be brought, scanned or this area illuminated.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laser Surgery Devices (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

Dispositif pour la photochirurgie et en particulier pour la kératotomie de l'oeil, comportant une source lumineuse operatoire, dont la lumière est applicable sur la région du tissu à opérer. Le dispositif ci-décrit est caractérisé en ce qu'il fait appel pour la production de lumière dans une plage de longueur d'ondes comprise entre 2,7 mum et 3,3 mum à une source lumineuse opératoire comportant une cellule Raman à pompage par laser pulsé. Il est ainsi possible d'obtenir un rayonnement dans la plage avoisinant 3 mum, dont la puissance autorise la pratique de la photochirurgie et dont la "qualité de rayons" permet une focalisation remarquable.
PCT/DE1986/000469 1985-11-16 1986-11-17 Dispositif pour la photochirurgie et notamment pour la keratotomie de la cornee Ceased WO1987002884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3540763.8 1985-11-16
DE19853540763 DE3540763A1 (de) 1985-11-16 1985-11-16 Vorrichtung zur lichtchirurgie und insbesondere zur keratotomie der cornea

Publications (1)

Publication Number Publication Date
WO1987002884A1 true WO1987002884A1 (fr) 1987-05-21

Family

ID=6286214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000469 Ceased WO1987002884A1 (fr) 1985-11-16 1986-11-17 Dispositif pour la photochirurgie et notamment pour la keratotomie de la cornee

Country Status (4)

Country Link
EP (1) EP0245392A1 (fr)
JP (1) JPS63501844A (fr)
DE (1) DE3540763A1 (fr)
WO (1) WO1987002884A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074861A (en) * 1988-05-23 1991-12-24 Schneider Richard T Medical laser device and method
EP0602756A1 (fr) * 1989-06-07 1994-06-22 University Of Miami Appareil de microchirurgie à laser sans contact
US5342350A (en) * 1990-02-16 1994-08-30 Jean Amiel Method of endoscopically treating lithiases with a multichannel probe suitable for draining the treated lithiases
US5364390A (en) * 1988-05-19 1994-11-15 Refractive Laser Research And Development, Inc. Handpiece and related apparatus for laser surgery and dentistry
US5846080A (en) * 1995-12-20 1998-12-08 W&H Dentalwerk Gmbh Laser dental devices and methods

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791927A (en) * 1985-12-26 1988-12-20 Allied Corporation Dual-wavelength laser scalpel background of the invention
WO1989011261A1 (fr) * 1988-05-23 1989-11-30 Schneider, Richard, T. Dispositif medical a laser et procede
US5782822A (en) * 1995-10-27 1998-07-21 Ir Vision, Inc. Method and apparatus for removing corneal tissue with infrared laser radiation
US6090102A (en) * 1997-05-12 2000-07-18 Irvision, Inc. Short pulse mid-infrared laser source for surgery
FR2842413B1 (fr) * 2002-07-18 2005-06-03 Univ Lille Sciences Tech Appareil pour le traitement de la degenerescence maculaire liee a l'age (dmla)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143052A (en) * 1983-07-06 1985-01-30 Lasers For Medicine Inc Laser ophthalmic surgical system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143052A (en) * 1983-07-06 1985-01-30 Lasers For Medicine Inc Laser ophthalmic surgical system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IEEE Journal of Quantum Electronics, Vol. QE-20, No. 12, December 1984, (IEEE New York, US), M.L. WOLBARSHT: "Laser Surgery: CO2 or HF", pages 1427-1432 see Abstract (cited in the application) *
Journal of Applied Physics, Vol. 57, No. 5, 1 March 1985, (American Institute of Physics Woodbury, New York, US), K. MIDORIKAWA et al.: "Output Performance of a Liquid-N2-Cooled, Para-H2 Ramar Laser", pages 1504-1508 see Abstract *
Optical and Quantum Electronics, Vol. 9, No. 6, November 1977, (Chapman and Hall Ltd., GB), D. COTTER et al.: "Stimulated Electronic Raman Scattering in Cs Vapour: a Simple Tunable Laser System for the 2.7 to 3.5 mu m Region", pages 509-518 see Abstract *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5364390A (en) * 1988-05-19 1994-11-15 Refractive Laser Research And Development, Inc. Handpiece and related apparatus for laser surgery and dentistry
US5074861A (en) * 1988-05-23 1991-12-24 Schneider Richard T Medical laser device and method
EP0602756A1 (fr) * 1989-06-07 1994-06-22 University Of Miami Appareil de microchirurgie à laser sans contact
EP0402250B1 (fr) * 1989-06-07 1995-10-18 University Of Miami Appareil de microchirurgie à laser sans contact
US5865830A (en) * 1989-06-07 1999-02-02 Parel; Jean-Marie Noncontact laser microsurgical apparatus
US5342350A (en) * 1990-02-16 1994-08-30 Jean Amiel Method of endoscopically treating lithiases with a multichannel probe suitable for draining the treated lithiases
US5846080A (en) * 1995-12-20 1998-12-08 W&H Dentalwerk Gmbh Laser dental devices and methods

Also Published As

Publication number Publication date
DE3540763A1 (de) 1987-05-21
EP0245392A1 (fr) 1987-11-19
JPS63501844A (ja) 1988-07-28

Similar Documents

Publication Publication Date Title
EP2413854B1 (fr) Dispositif pour la détermination non invasive de la température d'un tissu biologique traité par un rayonnement de traitement
DE3830378C2 (de) Ophthalmologisches Gerät
DE69129864T2 (de) Restenoseverhinderung durch ultraviolette Bestrahlung
EP2298254B2 (fr) Procédé et dispositif de traitement précis d'un materiau
DE60036048T2 (de) Verfahren zum Formen von blinden Bohrungen in chirurgischen Nadeln mittels eines diodengepumpten Nd:YAG-Lasers
DE69832079T2 (de) Kurzgepulster parametrischer mittel-infrarot-generator zur chirurgie
EP0143185A1 (fr) Appareil combiné pour diagnostic et thérapie de l'oeil
WO1992004871A1 (fr) Laser solide a impulsions, a longueurs d'ondes multiples, de construction de type modulaire, a usage medical
DE102012007272B4 (de) Lasereinrichtung und Verfahren zur Konfiguration einer solchen Lasereinrichtung
EP0395717B1 (fr) Dispositif d'ablation par photodecomposition de substances organiques et inorganiques, notamment matieres dentaires dures
EP2408410B1 (fr) Dispositif laser pour l'ophtalmologie
WO1987002884A1 (fr) Dispositif pour la photochirurgie et notamment pour la keratotomie de la cornee
WO2010060443A1 (fr) Système pour l'ophtalmologie ou la dermatologie
DE4029530C2 (de) Modular aufgebauter, gepulster Mehrwellenlängen-Festkörperlaser für medizinische Therapieverfahren
JP2012512539A (ja) Ｌバンドの高エネルギーサブピコ秒パルス用の光ファイバを有するパルスレーザ、及び眼科手術用レーザ用具
EP0402433B1 (fr) Dispositif pour detruire un corps solide entoure d'un fluide
WO1987006126A1 (fr) Dispositif pour la keratotomie
DE3936716C2 (de) Vorrichtung zur Beeinflussung von Material durch gepulste Lichteinstrahlung sowie Verwendung hierzu
DE3414986A1 (de) Lasersystem fuer chirurgische zwecke
DE2646029C3 (de) Chirurgischer Behandlungsapparat
DE3813482A1 (de) Vorrichtung zur erzeugung von laserimpulsen einstellbarer dauer
EP3664622B1 (fr) Procédé et dispositif d'étourdissement de bétail destiné à l'abattage
DE10206663A1 (de) Vorrichtung und Verfahren für refraktive Laserchirurgie
DE19910174A1 (de) Infrarot-Laseranordnung, insbesondere für medizinische Anwendungen
DE4440783A1 (de) Vorrichtung zum Schneiden von Gewebe

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1986906772

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1986906772

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1986906772

Country of ref document: EP